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Thread: 85 turbo diesel rebuild

  1. #1

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    06-02-2014
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    michigan
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    1985 Mitsubishi Mighty Max
    Engine

    4D55-T

    85 turbo diesel rebuild

    Blew a head gasket and trying to figure out some small details for this motor while redoing the top end. I looked through all the stickies but seems like I can't find some definite answers...

    I'm knew to the site and finding it very useful!

    Thanks in advance y'all!

    -How many foot pounds do the head bolts need to be?

    -Is Delo 400 the best oil I should use?

    -Is it possible to buy injectors instead of having them rebuilt? How common are they?


    I'm sure more questions will pop up but thanks for all the help!!!

  2. #2

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    08-11-2012
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    Richmond, CA
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    1989 Mitsubishi Mighty Max
    Engine

    G63B
    I'm sure someone has the answer but there are two Ram 50 diesel service manuals for sale on eBay right now...

  3. #3

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    michigan
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    1985 Mitsubishi Mighty Max
    Engine

    4D55-T
    I found the answer through a mechanic friend... 83 ft. Lbs max cold...

    Now my question is timing. does anyone know where the first cylinder needs to be? Ignition on TDC? Exhaust???

  4. #4

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    Richmond, CA
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    1989 Mitsubishi Mighty Max
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    G63B
    Mikewarme and 4d55 Performance are the resident diesel experts here...maybe they'll chime in if you ping them.

  5. #5

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    michigan
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    1985 Mitsubishi Mighty Max
    Engine

    4D55-T
    I've replaced the head from a guy in Florida. Also bought new injectors. Now I'm stuck in Paducah, KY with what I think to be is a fuel or air issue. The motor starts fine, has a slight bob on the Tack but stays close to 750 rpms. Once I start going down the road I lose power after getting up to 2,000 rpms. but if I let the throttle off for a few seconds and the power comes back. BUT then dies again. I usually have to change gears in order to keep it alive. THEN when I park the vehicle it idles fine. I changed the fuel filter and it ran fine for 200 miles until the problem started up again. I just put a new filter on (thinking that this whole issue was related to bad fuel or algae for that 200 miles) and the problem continues. In fact I think it's worse. Any ideas out there? I'm stranded and gotta figure this one out! Thanks y'all!

  6. #6



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    Pittsburgh, PA
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    1980 Dodge D-50
    Engine

    G54B
    sounds like a fuel pump issue - either not fully bled out or out of time. PM Mike Warme or email him at Mikewarme@yahoo.com
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

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